A homeowner built this, not a tax firm.

In 2026 I protested my own Harris County property taxes. What I found out is that the data you can use to investigate an assessment is free, public, and sitting right on the county appraisal district's own website. The catch is that it's buried in complexity, and most homeowners never realize they can pull property records and prepare a challenge themselves.

I built a self-service alternative for homeowners who want to prepare their own appeal. The free address check shows available county records and preliminary comparisons where supported. It does not establish overassessment for every property. Choose the national $29 preparation kit or preview the evidence available for the separate $49 Property Assessment Audit.

Our property analysis uses public county assessment records. Available comparisons and valuation methods depend on the jurisdiction, source year and property data. Assessment-record comparisons are not automatically verified recent sales or a certified appraisal. Read our methodology and limitations.

Where comparable evidence is available, we identify the underlying properties so you can verify them. A result without a supported appeal case does not prove that an assessment is fair. The $29 kit does not include a parcel-specific comparable report. The $49 Audit provides only the filing or valuation output supported by the available evidence; it does not guarantee lender acceptance.

The same rule governs the legal dates. Our appeal deadline calendar for all 50 states and DC cites a state revenue department, an official form, or statute text on the legislature's own site for every single date, and shows the day each one was last checked. Where a state has no statewide deadline, which is most of them, it says so instead of printing a confident number that would cost someone their appeal.